static class MyWebView extends WebView
        {
            public MyWebView(Context context)
            {
            super(context);

            this.getSettings().setJavaScriptEnabled(true);

            //enable support for DOM Storage and Database
            this.getSettings().setDatabaseEnabled(true);
            this.getSettings().setDomStorageEnabled(true);


            String databasePath = context.getDir("database",Context.MODE_PRIVATE).getPath();

            this.getSettings().setDatabasePath(databasePath);


            this.setVerticalScrollbarOverlay(true);
        } }

这是JavaScript上的测试应用程序：

function testStorage() 
    {
        var storage = window.localStorage;
        if (storage) {
            try {
                storage.setItem("name","Hello World!"); //saves to the database,“key”,“value”
            } catch (e) {

                    alert(e.message); //data wasn’t successfully saved due to quota exceed so throw an error
            }
            document.write(storage.getItem("name")); //Hello World!
            storage.removeItem('name'); 
        }
        else {
            alert('Your browser does not support HTML5 localStorage. Because Storage is' + storage);
        }
    }

但问题是localStorage总是为null,我检查了权限并创建了一个WebChromeClient

@Override
            public void onExceededDatabaseQuota(String url,String databaseIdentifier,long currentQuota,long estimatedSize,long totalUsedQuota,WebStorage.QuotaUpdater quotaUpdater)
            {
                quotaUpdater.updateQuota(estimatedSize * 2);
            }

从来没有被称为.
谁知道为什么？

谢谢